Chuck or die for pointing or rounding ends of bolts.



N0. 679,540. Patented July 30, l90l. G. W. PACKER.

CHUCK OR DIE FOB POINTING 0B BOUNDINEENDS 0F BOLTS.

(Application filed 1101.7,1900.

(No Model.)

IJZ A Inventor:

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UNTTnD STATES PATENT OFFICE.

GEORGE W. PAOKER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE DEERING I-IARVESTER COMPANY, OF SAME PLACE.

CHUCK OR DIE FOR POINTING R ROUNDING ENDS 0F BOLTS.

SPECIFICATION forming part of Letters Patent No. 679,540, dated July 30, 1901.

Original application filed August 2, 1900, Serial No. 25,637. No. 35,754.

To aZZ whom it may concern.-

Be it known that I, GEORGE W. PACKER, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Chucks or Dies for Pointing or Rounding the Ends of Bolts, of which the following is a specification, the same be ing a division of my application, Serial No.

25,637, filed August 2, 1900.

This invention relates to dies or chucks primarily designed for pointing or rounding the ends of bolts or bolt-blanks, but which can be used for pointing or rounding the ends I 5 of other articles or devices.

The object of the invention is to construct a chuck or die by means of which the pointing or rounding operation will be performed quickly and in a positive, reliable, and uniform manner in each instance; and the invention consists in the features of construction and combination of parts hereinafter described and claimed.

, In the drawings illustrating the invention,

Figure 1 is an end elevation or plan view of the acting end of the pointing or rounding chuck or die and its cutters or tools; Fig. 2,

a side elevation of the same; and Fig. 3, a cross-section of the head of the chuck or die,

showing one of the cutters and its adjusting and locking screws in elevation and showing also the driving shaft or spindle in elevation.

The chuck or die is constructed with a head or support A, preferably of a cylindrical 3 5 shape and of a sufficient length to receive and carry the cutters or tools. This head or block A in the arrangement shown has in its body three openings or slots B, each of which receives a cutter or tool 0, which stands at an inward inclination, for which purpose the inner wall of the opening or slot is on an incline, with the inclines of the inner walls of the several slots or openings running to a common central point. Each cutter or tool has an acting or cutting end 0, with its sides beveled and its cutting end or edge on an incline, as clearly shown in Fig. 3, and this construction of cutting end in conjunction with the incline of the cutters or tools forms a central space within the line of the cutting Divided and this application filed November '7, 1900. Serial (No model.)

edges, which space is of a tapered or coneformation,by which the pointing or rounding effect is produced in the operation of the chuck or die. Each cutter is held firmly when inserted by a set-screw b, which forces the cutter or tool firmly against the inclined wall of the slot or opening, and a correct and proper projection of the acting end of each cutter or tool is secured by an adj ustingscrew 2), by means of which the cutter or tool as a whole can be advanced or receded, as required, for the adjustment of its acting end. The cutters or tools 0 are each entered into its opening or slot in the body of the head or block and are each adjusted endwise for positioning the acting end by the adjusting-screw b, which screw-threads into the body of the head or block, and when properly and correctly adj usted each cutter is locked and held in its adjusted position by the set-screw b, which also screw-threads into the body of the head or block. The construction and adjustment of the cutters or tools is one which enables the acting ends to be brought closer together or spread farther apart, according to the degree of projection given to the acting ends. The formation of the acting ends with their cutting edges on an incline produces a graduated tapered space between the acting ends, and this graduated tapered space enables bolts or bolt-blanks of different diameters to be operated upon, producing a pointing or rounding with a greater or less amount of taper or incline, according to the length of projection of the end of the bolt or bolt-blank into the space between the acting ends, less extent of projection into the space the less the taper and the greater extent of projection into the space the greater or longer the taper given to the end of the bolt or bolt-blank. It will thus be seen that bolts or bolt-blanks of different diameters can be operated upon and that any amount of pointing or rounding can be given to the end by regulating the projection of the acting 5 end of the cutters or tools and the projection of the end of the bolt or bolt-blank into the space between the acting ends of the cutters or tools.

The head or block at its receiving end has a too chambera, into which the acting ends of the cutters or tools project, and leading'from this central opening or chamber are discharge slots or openings a, having inclined faces or bottoms a by means of whichthe cuttings or. shavings which are made by the operation of the cutters or tools and which drop into the central opening or chamber are discharged therefrom through the side slots or openings, and such discharge is permitted and facilitated by reason of the inclined faces or bottoms (1 which prevent any clogging or stopping of the cuttings or shavings in discharging.

The head or block at its receiving or acting end is provided with a guide or centering-plate D, having a central opening or mouth (1 for the admission and projecting intoposition for the operation of the cutters or tools of the end of the bolt or bolt blank, and so that such end will be central of the acting ends of the cutters or tools and be givena' perfect, true, and uniform pointing The guide or centering-plateor rounding. has a screw-threaded boss or'neck which onters a screw-threaded opening in the end of the head or block, andthis construction enables the guide or centering-plate to be changed as required to suit boltsor boltblanks of different diameters, for which purpose guides or centering-plates. having mouthsor openings of different diameters are employed.

The head or block in the construction shown is attached to the end of a driving spindle or shaft E by-having a screwthreaded the arrangement shownandv described in my said application, Serial'N-o. 25,637 -and when the chuck or die'has-performed itsworkthe bolt or bolt-blank is to be withdrawn-with its end properly and correctly pointed'or rounded. The operation of pointing'or rounding will be. rapidly performed by the action of the cnttersor tools, and inasmuch as the cutters or tools havela uniform set and the space between their acting ends is likewise uniform it follows that the operation on the end of the bolt or bolt-blank will in each instance be the same, producing a regular, accurate, and uniformpointing or rounding of the ends of all the bolts or bolt-blanksoperated upon,

which is a: result desired in the'pointing or rounding of'bolts or bolt-blanks or rods or other articles in which it is desirable to have auniformity of construction.

I claim- 1. In a chuck or die for pointing or rounding, the combination of a block or head having in its body a pluralityof retaining side openings or slots, each opening or slot communicating with a central end chamber in the block or head and each opening or slot having a back or inner wall inwardly converging toward the end chamber, a plurality of cutters or tools for pointing or rounding purposes, one cutter or tool. for each side opening or slot, each cutter or tool having its acting end projecting endwise into the central end chamber of the block or head and set against the converging back or inner wall giving each cutter or tool an inward inclination, and means for adjusting and locking the tool in its retaining opening or slot, substantially as described.

2. In a chuck or die for pointing or round- ,ing, the combination of a block or head-having in itsv body a plurality of retaining side openings or slots, each opening or slot communicating with a. central end chamber in the block or head and each opening or slot having a back or inner wall inwardly converging toward the end chamber longitudinally of the block or head, a plurality of cutters or tools for pointing or rounding purposes, one cutter or tool for each side opening or slot, each cutter or tool having its acting end projecting endwise into the central end chamber of the block or head and set against the converging back or inner wall giving each cutter or tool an inward inclination, an end adjusting screw or stem for each cutter or tool abutting against the end of the cutter or tool, and a side clamping stem or screw for each cutter or tool abutting against the outer side face of the cutter or tool, for

the stems or screws to act and set and adjust the cutters or tools,substantially as described.

3. In achuck or die for pointing or rounding, tlie combination of a block or head, a guide or centering-plate on the receiving end of the block or head, a central opening or chamber in the block or head beneath the guide'or centering-plate, a series of discharge= openings leading from the central chamber outward, each discharge-opening having an inclined bottom diverging from the bottom of the central chamber, a plurality of side openings or slots in the body of the block or head, each side opening or slot communicating with the central end chamber in the block or head and each opening or slot having a back or inner wall' inwardly converging toward the end chamber, a plurality of cutters or tools for pointing or rounding purposes, one cutter or tool for each side opening or slot, each cutter or tool having its acting end projecting endwise into the central end chamber of the block or head and set against the converging back or inner wall giving each cutter or tool an inward inclinatiomand means for adjusting and retaining each cutter or tool in itsopeningor slot with its'cutting endprojected into the central opening or chamber, substantially as described.

4. In a chuck or die for pointing or rounding, the combination of a block or head having a plurality of longitudinal slots or openings in its body converging toward a central chamber in the end of the block or head, and a plurality of cutters or tools for pointing or rounding purposes,adj ustably set in the block or head and having their acting ends proj ected into the central chamber concentrically around such chamber with an inward inclination for the acting ends, and each acting end having an inwardly inclined cutting edge forming a tapered 0r inclined space within the cutting edges, substantially as described.

5. In a chuck or die for pointing or rounding, the combination of a block or head having a plurality of longitudinal slots or open ings in its body converging toward a central or inclined space formed by the cutting edges of the cutters or tools, substantially as described.

GEORGE W. PACKER.

Witnesses:

CHAS. N. CHAMBERS, MARVIN CRAMER. 

